Pathetic service from Samsung Promotions Contact Centre

The most pathetic and useless service from Samsung Promotions, ever! Purchased a Samsung Galaxy S23 end of Feb 2023 and, as per the promotion, was supposed to receive the Samsung Galaxy Tab S6 Lite via courier. Without contacting me to arrange a delivery date or time, the courier company (Courier IT) attempts to deliver when no-one is available. Now the courier company says the device was returned to Samsung over 2 months ago. Numerous attempts (over 8-10 telephonic calls chatting to agents from March at Samsung Promotions Contact Centre) have yielded no resolution, despite Samsung confirming (1) the device is at their warehouse, (2) a senior consultant will resolve the case urgently, (3) the device will be re-dispatched, (4) and the courier company will call me to arrange delivery. These constant false promises by the Samsung Promotions Contact Centre is just unfathomable. I even offered to collect the device myself from the warehouse, which Samsung declined. Where is the device? Why is not being delivered? What is the issue?